Here's my list for date coding engine components based on information provided by John Hinckley at the CRG.
Date coded components installed at the Flint Engine Plant would pre-date the engine build date stamped on the block pad.
Date coded components installed at the Norwood Engine Dress Line would pre-date the cowl tag build date although there are some documented exceptions to that.
My understanding is that dated components can pre-date the engine or cowl tag build dates by approx. 3 months.
At Norwood, the vin was stamped on the engine and transmission just after they were mated on the Engine Dress Line.
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